Mold for making packing or the like



N. E. JOHNSON MOLD FOR MAKING PACKING OR THE LIKE Filed 001;. 10, 1923 Qfqaizfar? w f i ww mfwzz. 32 M45 m Patented Mar. 20, 1928.

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"NO'RMAN'E. JoHnsoIv/or c'H'IoAeo, 'I 'LINoIs, Assienon 'roonIoAGo nnorao :eiaon- U'oTs GOMPANYyUF CHICAGO, ILLInoIs, licensee-Arron 0F ILLInoIs.

Mom) non MAKING PACKING on THE LIKE.

Application filedOc'tob'er 10, 1922. Serial No. 667,696.

My invention belongs toth'a't general class of devices known as molds and relates more particularli to a mold adapted for'the makingo f pac ing rings in a plurality of sections suitably secured together for conven- 161160111 assembly and'apphcation.

The invention has among its objectsthe production of a device of the 'kind'descrlbed that is'simple, convenient. compact, efiicient and satisfactory for use wherever "found applicable. It has particularly 'as 'an'object the saving of time and labor :in makingthe rings, as well as producing amore satisfactory ring.

Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosure herein given.

To this end my invention consists in the novel construct-ion, arrangement and combination of parts herein shown and described, andmore particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like '01 corresponding parts: i

Figure 1 is a plan View of any improved mold;

Figure 2 is a sectional view taken substan- 'tially on line 22 of Figure 1 Figure 3 isa sectional view taken substa'ntially on line 33 of Figu're'Z;

Figure 4 is a sectional view taken substan- 'tially on line "4-4 of Figure 3, the "upper section of the mold being-also shown to better illustrate the invention; and

Figure 5 is a perspective view ofa' cast or molded ring. I

Referring particularly to Figure 5, I have shown a packing ring consisting of the desired number of sections 1 which may be S'e-.

cured together by the connecting members 2 of soft wire orequivalent connecting means. The mold shown consists of a part 3 which is provided with a recess or cavity 4 of the desired size and shape to cast the ring. The

part 3 may be of any suitable material and obviously the recess e may vary in contour depending on the particular article to be molded. As shown, part 3 is mounted on a spindle or support 5 and maintained from rotation thereon in any suitable manner, for example by a key 6 or its equivalent.

In making a ring of a plurality of sections, I prefer to provide a plurality of what may be termed partitions or separators 7 'avhich are arranged in the grooves 8 on the 'pa'rtBand extend acrossthe recess 4. These maybe secured in place in any suitable manner, the preferred construction being to at 'tachth'em to aring'9 by meansof the rivets 7 1O or t'he equivalent. They are thus maintained-assembled and are noteasily displaced and may be. interchangeably employed in molds, slightly greater or smaller molds.

The members shown are provided with notches 11 111 which the wires 2 may be placed before'p'ouring the metal. It will be noted that the separators 7 divide the mold cavity into a plurality of matrices. Arranged to cooperate with the part 3 of the mo'ld is a part 15 which is formedwith a gate opening 16 for each section so that the molten metal may be poured into the recess 1. i 7

it will be noted 'byr'e'ferring to Figure 2,

that-I prefer to make the edge 17 at the bottom of the opening 16 substantiall sharp. -The member 15 is rotatably or movably mounted "on the spindle 5 and may be provided' with one or moreopera'ting handles or lngs 1-8.

In fusing *the mold the Wires 2 are placed as shown and -the'nce -the-part 15 applied. The metal inay' t hen be poured through the gateopeni ng's 16, flowing into the recesses l where it hardens, forming the packing rings.

Obviously, some of the material will generally partially fill the gate openings as indicated at 16, this being what is --generally termed a gate. Before removing part 15 i rom theifmold part 3 to remove the cast ring, part 15 is partially rota ted on'the spindle, thereby severingall gates which, upon turning over the part 15, will drop out of the gate openings and the cast ring may then be readily removed frond the mold. Obviously, -it is in'imater-ialas to which mold part is moved relatively the other, but it is generally more convenient to make the part however, this method of connecting the sections is employed, I prefer to make the notch somewhat larger and in some cases provide a plurality of notches.

Obviously, when the gates are removed in the manner described the shearing off of the same takes place practically simultaneously with the removal of part 15, so 'that'when the ring is removed from the mold it is a completed ring, requiring no further operations other than to assemble or pack, the same being usually assembled with rubber orequivalent rings, not necessary to describe in detail herein. The time and labor in removing the gates by breaking or otherwise and filing or scraping down the surface so as to produce a finish, is entirely obviated, and in addition a more finished product is secured, as the gates are cut off flush and shearing may be very easily done by hand,

for harder materials the part 15 may be operated by power rather than manually. It is not considered, however, necessary to describe this in detail, as it will be obvious to those skilled in the art.

Having thus described my invention, itis obvious that various immaterial modifications may be made in the same without departing from the spirit, of my invention; hence I do not'wish tobe understood as limiting myself to the exact form, construction, arrangement and combination of parts herein shownand described, or uses mentioned.

IVhat I claim as new and desire to secure by Letters Patent is:

1. In apparatus for molding metallic packing rings, a mold section having a mold cavity therein, a plurality of partitions arranged transversely of the mold cavity for forming a plurality of independent chain'- bers in the mold cavity, a second mold section revolubly mounted with respect to said first mold section and having a gate for each of said chambers, and means for rotating said second mold section with respect to the first mold section.

2. In apparatus for molding metallic packing rings, the combination with a mold having an annular recess therein divided into a plurality of circumferentially dis posed matrices, of a cover for said mold, said cover being provided with a plurality of gates through which molten metal is poured into the respective matrices and affording shearing edges at the under side of the cover, and means disposed axially of the mold recess for pivoting the cover upon the mold.

3. In apparatus for molding packing rings, a mold section having a moldcavity therein, a plurality of partitions arranged in said mold cavity for forming a, pluralityof independent chambers, said partitions being adapted to support inserts to be embedded in the packing ring, and a second mold sec- .tion revolubly mounted with respect to said firstmold section when it is operatively engaged therewith and having a gate foreach of said chambers. a i

4. In apparatus for molding packing rings, a mold section having a mold cavity therein, a separable member comprising a plurality of partitions arranged transversely of the mold cavity and dividing the mold cavity into a plurality of independent chambers, and a second .mold section. revolubly mounted upon and carried by said first mold section and having a gate for. each of said chambers. I

5. In apparatus for molding packing rings, a mold section having a mold cavity therein, a separable member comprising a plurality of partitions versely of the mold cavity and dividing the mold cavity into a plurality of independent chambers, each of said partitions being grooved to hold an insert to be embedded in the packingring, and aisecond mold section revolubly mounted upon said first mold 'sec-' tion and having a gate for each of said chambers.

6. The combination with a mold having an annular recess therein divided into a plurality of circumferentially disposed matrices, of a cover for'said mold, said cover'being provided with a plurality of gates through which molten metal ispoured into the respective matrices and affording shearing edges at the under side of the cover, and means disposed axially of the moldrecess for coupling the cover to the mold, said means also serving asa pivot for the cover.

In testimony whereof, I have hereunto signed my name.

NORMAN n. oniison.

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